of chicago



w. SMITH. LOCOMUTWE MCH BFLCK.

APPLICTON HLEU AHL i9; 96.

Patented Aug. 8, 1916.

2 SHEETS-SHEET 2.

f UNXTED STATES PATENT Fir-ifo- WILLIAM SMITH, OF CHICAGO, ILLINOIS,ASSIGOR T0 UNIVERSAL .ARCH COMPANY,

OF CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS.

LOCOMOTIVE ARCH-BRICK.

specification of Leiters Patent.

rateualaug. e,- i916.

Appiication'iiiedfiiprii is, isis. semi No. 92,165. p

To all whom it mag/concern.'

Beit known that AI',W"iLLiiiiii Siii'ri-i, :i citizen of theUnitedStates, residing at Chicago, i'n the couiityof' Cook and State ofIllinois, have invented certain nev.v and useful Improvements 'inLocomotive Arch- -Br'icks, of which the following is a specilieation. vp

The present invention relates to the forni, of brick used in the Fireboxof locomotives for providing av battle oi' detlecting arch therein, andrelates zmore particularly to the form and constructioiiofthe centerbrick of the sets of lbrick used in the above manner.

One object of the invention visto provide a center brick which will berelatively light in weightand at the same time will have sufficient.bodyA strength to withstand the strainit is subjected to iir'use.

,A further object of the invention' is to utilize the ribs whichstrengthen the bodyv .portion as' baffles on the `under face of thebricks., to provide interruptions, which assist in the breaking up ofthe'products of eoiiijbustion, thereby eliminating smoke.

A' further object of the invention-is to provide. 'spaces or openingsbetween the un der "faces of the side edges of the bricks and the bodyof the tubes, upon which the bricks are resting, thereby permitting acir-- culation or passage of heat clear around the tubesto Ainsure aneven distribution of lic-at.

'throughout the'entire area of the tube. The

invention further consistsin tlie features of construction andcombination otparts here inafteixdesoribed and claimed.

In the. drawings; Figure 1 is av sectional View of a locomotivefire-box, with the bricks of the.' present invention placed therein;Fig. 2, a Vsectional plan view through the tire-box, showing the bricksof the present invention therein; Fig. 3, a cross Asection on asomewhatenlarged scale, show'- `ing arow of bricks resting upon thetubes 45'and against the side wall of the fire-box;

ing on tubes; Fig. an enlarged side vie-e Fig.v 4, a Vtragmentalenlarged View of the parts shown iii Fig. 3, showing one of the centerbricks and one of the end bricks rest .of two ,of the center bricksrest-ing upona tube; Fig. 6, an under face View of the eenY ter/brick;Fig. 7, a front edge view o one ofthe center bricks; Fig. 8, a side edgeView otono of the center bricks; and Eig. 9, a

perspective of one ofthe front or spacing bricks.

Iii the art to which tli'e., present invention relates, there' hasdeveloped a -practice of placing a plurality ofbricks upon the 'cculation tubes, which extend-within and through the i'ire-box of alocomotive, there by constituting a be inserted through and extractedfrom 'the interior oi the tire-box, asis iiecessarv to maintain a properand completebatiie or arch therein. Necessarily, the' weight of thebricks enters materially into-thecase and quickness with which theymaybe inserted or removed, and it is desiablel *to` make tlie bricks aslight as .possil; l"ef','con'sist,`

ent with suiticiei'it' body strength tofstazid l up under use.

vIn the present invention vthemajor'. por

tion of t-'iie bricks is made relativel v thin and a strengtheningrib'plac'ed on tli` "Vuuder face, so to make it su'fiicientlystrong' 4 Ybaiie or defies-ting arch within said 'iii-esbox. These arches are madeVup oi' a plurality yof bricks, each ot' asize to" for use, and at. thesaine tinier'edi'ice thev` weight which would be present if the bedjofthe bricks t' emliout- Were'niade tiii it enough to be of ...ntpractical strength. Also, these ribs e arranged and' disposed in amanner so that they provide battles or interruptions on tbeunder face ofthe bricks. which assist in breakin@l u i the irodf .b i ucts of combustioii and eliminating the ticularly to Figs. l and 2, the inventionis.

shown in conjunction with an inner tire-box section l0 and an outerfire-box l1. The inner section consist-s of an inner tube supportingwall l2, an outer Wall 13, side walls 14, und a crown sheet l5; and theouter section comprises an outer Wall 1G, a top wall f*f and throat.wall 1S. The arrangenic-n of t se Walls "o" 4les an outer water ieg 19.i( i water leg and. :i top water chainthe bei' Qi; and water legs I9 and2O are closed by the usual mud rings als Y generally by the referencenumeral 25.

/ he end bricks are grooved at their-inner edges 27 to fit over theouter of the tubes 23, andare formed at their outer edge with a flatface 28, adapted to rest against the side sheet 14.0f the inner fire-boxsection. This face 28 is so formed that'when the brick is placeddiagonally, as shown in Figs. 3 and 4,

*the face 28 will' rest, against the side sheet with -a full surfacecontact for its entire length; As shown in the drawings, these endAbricks taper toward the'outer end for the urpo'se of reducing weight.

The center brick comprises a body portion formed on its under face withdepending ribs or bailles 29. As will be seen from Fig. 6, these ribsextend diagonally from opposite corners of theunder face and intersectone another, so as to produce a rib of X-shaped formation on the'. underface. It is `f/wel/l known that a rib of this type is a veryf'goodmechanical construction for strengthening purposes. Therefore, the bodyof the brick may be-of relatively thin construction, since the jirib.will provide a reinforcement that will render the brick sufficientlystrong for f practical use.` `By makingpossiblethe em'- ploymentof arelatively thin body, necessarily, the brick is reduced in weight, sothat the handling of it for the purpose of inserting into or removing'om the fire-box is expedited; and also ti.. amount of materialnecessary to 'make' ile brick is reduced, cheapening the cost ofconstruction. The strengtheningribs form'bafl'les or interruptions alongthe under lfaceof the bricks, which tends to break up the products ofcombustion passing beneath the bricks, thus reducing smoke. As will beseen from the drawings, these center bricks have the side L edges'oftheir under face resting upon the circulation tubes, and for thatpurpose ribs 3() are formed, which extend inwardly from the termini ofeach of the ribs 29, and these ribs 30 are provided with grooves 31adapted to receivethe surface of the tube. The adjoining edges of these.ribs 30 are spaced apart somewhat thicker than the body portions, sothat when the bricks are placed upon the tubes, there is an opening 32provided between that portion of the body lying between the adjoiningends of the ribs 30 and the outer periphery of the tubes, thuspermitting a circulation of heat clear around the tube. This isconsidered to be desirablebecause of the fact. that if the bricks weremade so that the upper portion of the tubes were entirely surrounded orinclosed by the bricks resting thereon, the bricks, becoming heated,would necessarily maintain the upper p'art of the tube in acorrespondingly heated condition. The lower portion of the tubes, beinguninclosed by the bricks, would be subjected to the changes in heatwithin the interior of the fire-box, which take place 4because of thefrequent opening of the firebox door. Thus, different portions of thetubes would be in different degrees of heated condition, whichwouldcause a swelling -or blistering of the tube along the lower edges oftheA bricks, thereby rendering the tubesliable to breakage. In thepresent invention this danger is' eliminated by allow/1- ing a passageof heat clear around the tubes, maintaining them in an even heatedcondition throughout their length. A front or spacing brick 33 isemployedfwhich spaces the archbrick away from the Wall 12 to permit acirculation of heat through the lirebox. This latter, however,.is wellknown in the'art.

claim:

1.'"`A locomotive arch brick, comprising a body formed with intersectingribs on its under face extending from opposite corners `of the bricks,and inwardlyextending 'ribs running from the termini of the intersectingribs, said inwardly extending ribs being ,.f/grooved to fit over a tube,and the adjacent edges of said inwardly extending ribs being spacedapart to provide a space between the body of the brick and the outerperiphery of the tube to permit a circulation of heat completely aroundthe tube,'substantially as described.

2. A locomotive arch brick, comprising a body grooved along the underside edges to fit over a. tube, and formed with intersecting ribs on itsunder face constituting an X-shaped reinforcement for the body, and saidribs also furnish-ing a series of diagonally-extending baille walls onthe under face ofthe brick, substantially as described.

3. A locomotive arch brick, comprising a body grooved along its underside edges `to fit over a tube, and formed with intersecting ribs on itsunder face to create an X-shaped reinforcement for the b'ody, each ribbeing V-shaped in cross-section, and said ribs combiningr to form aseries of diagonally-sloping substantially as described.

WILLIAM SMITH.

